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Absolute OpenBSD, 2nd Edition by Michael W. Lucas

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Time and Date

Correct system time is not only a convenience, but also a security issue, because many attacks rely on changing the system clock. However, if your system clock is wrong to start with, you won’t notice a change. Without coherent time across all your servers, you’ll never be able to correlate your logs when troubleshooting. What’s the solution? Fix your time settings before you do anything else. Correcting the time requires both setting a time zone and the clock.

Setting the Time Zone

The installer tries really hard to guess your time zone, using geolocation tricks and a script at the OpenBSD website. If these didn’t work for you, or if you weren’t on the Internet when you installed OpenBSD, or if your company policy says that ...

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